Cutter chain



Nov. 23, 1943. E. J. DOBERSTEIN 2,334,813

' CUTTER CHAIN Filed Dec. 15, 1941 2 Sheets-Sheet 1 IN VEN TOR.

W JZbJe/Uleja ATTORNEY Nov. 23, 1943- a J. DOBERSTEINI CUTTER CHAIN Filed Dec. 15, 1941 2 Sheets-Sheet 2 a a aid ATTORNEY along line ii- 5, grannies; e. I 6 is a sectionaliview. takensubstantially T Patented Nov. 23, 1943 I 2::

. 1 *VC r AIN; r n 1 sewn-st. Doherstein, Blue Island, 111., assignortb Goodman Manufacturing IlL, a corporation of Illinois.

Company," Chicago,

; npplication lleeember. 15, 1941, Serial N0. 4,62,1 ,58

7 link of the chainfis engagedby ato'oth of the sprocket, to prevent buckling oi the chain and to increase thelife thereof.

A more specific objectof my invention is to 5 provide a new and improved cutter'ch'ain'and drive sprocket therefor; which isjso arranged as to have center teeth en ageable with .the ends of the connecting links of the chain, between the sides f'the yokes of the bitcarrying links of the, chainjand tofifhavejalternate teeth :spacedfrom said center teeth for engagement with the outer sides of the yokes of theflchain, to render it u'nnecessary to cut, away the connecting links of the chain to provide; bit receiving portions therein, and thus to provide a stronger more durable chain than formerly; f A still further objectfo'f my inventioh is toprcvide a new and iniproved c'onnectmg means'of. a' simplified construction, for connecting the'links 30 of acutter chain togethenlso arranged, that the chain may readily be detachable and the connect: ing means, may beheldfrom' 'piVOtaLm VementT with respect to the chain.

Other objects of my invention will" appear from, time. to time as the. following specification prcceeds and with reference t'o'the accompanying drawings wherein? v i a A 1 Figure Lis. a plan .view off'a cutter chain con structed in accordancewith my invention; sliovv ing the cutter? chain 7 trained aroun' sprocket; l g Figure 2' ise, sectionaliview ftfaken is'ub sta 1-1 tially alo'n'g line 2+2ofliigure 1 i Figure 3 isan enlarged detailplan view of the cuttercha'in shown' in 'Eigurefl with certain parts a broken away and. certain otherffpartsshowrninj horizontal section; j Figure 4 is a, fragmentary, plan view drawn to; the same scale as Figure '3, butfshow'ihg the bit; holdingrneans in a released position; ,v Fi ure; 5" is asctional' view t'ake i i substantially along line e-qs'or Figure 3;

are pivotally l5 of the yoke of the bit chain; A pin 24 extendsthrough said hollow'pinf V and is adaptedtoihold said hollow pin in'posithin in the legs 15, I5. .Saidpin hasanfirregj Figure is asectionalyiew along line l-'! of FigureB; and i Figure 8 is a sectional view taken substantially alongline 8'8 of Figure 3. In the drawings the cutter chain is shown as trained around a drive sprocket HJ ona vertical drive shaft H, and comprises a' plurality of bit carrying links 12, i2 having cutter bits P3,: I3 mounted therein; with a plurality of connecting necting said bit carrying links together. Each offsaid bitcarryinglinks lS'0f& well'known'yokeconstruction having apair of parallel spaced legs l5, l5 embracing eyes ifi, [6. at opposite ends 0f said connecting links. The ends of the legs. of the yokes of said bitcarrying links are of acurved formation, to conform to" the form of the teeth of the cutter chain drive sprocket, and are adapted to be engaged by alter-f nate upper and lower teeth I1, I Tof'saidsprocket, extending along opposite sides ofsaid corn nesting links.

nectinglinks of the chain are likewise of a curved forin, conforming to the form oi theteeth of the cutter chain sprocket andjas herein shown, are

adapted to be engaged by center teeth I8 of the, sprocket arranged alternately with said upper" and lower teeth andtoextend between the legs 01 the yokes of the bit carryinglinks, of the chain;

sothat each link of the cutter chain-is engaged.

by a sprocket toothj This provides a more, uni? formdrive to the, chain than formerly andpre; vents buckling thereof and reduces wear on the connecting links of the chainto formjtooth re.-

ceiving sockets therein, aslhas i heretofore been done, g l Theconnect' g links and yokesof the chain cone head 23 adapted to have elongated recessed portion war head 25 adaptedto fitin an elohgatedfshoul dered portion 20 of the leg of the yoke opposite; from the head 23. The end of said pin opposite" taken substantially;

The endsof the eyes of the con connected together by meanspf, bushings 2], 2i: mounted on hollowvp'inslziz." Said bushings extend within the. eyes of the nec'tin'g links of the chain,and"saidhollowipinsf extendfthro'ugh said bushings and through theh legs l5, l5. oft 'theyokes of the chain. Each' at said hollow pins isprlovided with an irregular. engagement with an 28 formedin one leg carrying link of the;

beliniit'ed in the'ap'pended clairnsfif v other and to the yoke of the chain and provide readily detachable mountings for the bushings Referring now in particular to the novelmeans for holding the cutter bits l3, IS in the bit receiving links of the chain, a bit receiving portion 21 projects from abridge 29, connecting the legs of the yoke of the chain together. Said bit re ceiving portion is provided with a plane forward surface 30, inclined inwardly and'rearw'ardly from in said bit carrying portion and for protecting said bit carrying portion during the cutting operation including a shield adapted to extend 1 around said bit carrying portion and having a surface adapted to engage an advance side ofa bit and also having an apertured portion through which the bit extends, and a screw threaded in a rear portion of said shield and engaging a rear portion" of said bit carrying portion; for drawing, l

said shield rearwardly along said bit' carrying portion and for engaging said engaging surface "of said shield with the advance side of said bit.

j 2, In a cutter chain, a plurality of alternately arranged bit carrying and connecting links, each of said bit carrying. links having a projecting bit carrying'portion having a bit receiving recess the outer endof said bit receiving portion, against V tecting, said bit carrying portion against abrasion which the rear face of the bitis adapted to abut and be held in atforwardly inclined position. Said bit receiving portion is likewise provided with an inclined surface 3i inclined in an upward and forward direction from the bottom of said, plane surfaceat the angleof inclination of the lower K cutting'edge of the bit, and adapted to fform a support and stopior the bit. A tongue 33 is spacedupwardlyfrom the bridge 29 and projects forwardly from said bit receivingpertion andhas' slidable engagement with a notch 34, formed on an inside of a forward wall of a bit holdingrshield 35.1 Saidbit holding shield-is adapted to extend v, over'and surroundsai'd bit receiving portion and has an apertured top portion which is indicated by reference character 35, which forms a passage for the bit is and has slidable guiding engagee Inentwith' 'an integrally .formed outwardly projecting guiding portion 31 ofsaid bit receiving portion. ,An inner face 39 of said bit holding shield is inclined to conform to the angle of inclination of the bit and the plane surfacefiii, and is adapted'to engage the forward-face'of the bit,

- to clamp said bit'in position.

The'means formoving said'bit holding shield into clamping engagement with the bit, as herein shown, includes a scre'wifiil. threaded within a rear 'wall M of said bitholding shield and' havin g a plain i'nner end 32 engaging areces's formed in the rear part of the bit receiving portion 2l,"so that rotation of said screwin a clockwise direc-' tion will draw said shield in a direction to engage the surfacete withjthe forward face of the bit 1 and'will clamp the bit in position in said bit receiving portion, When said screw is loosened a distance sulficient topermit the tongue 33 to come 7 out of engagement of the notch 34 and to permit the end 42 of said screw to come out of engage ment with the apertured portion ofthe bit receiving portion 72? and bit holding shield may readily be removed and renewed. It should be understood, however, that said shield is not'renewed when changing bits but is only renewed when'wo'rn," j l I r I While @I have herein shown and described one form in whichmy inven scope thereof, Furthermore, Ildo not wish to, be construed asflimiting my invention to the specific embodiment illustrated, excepting as it may I claim as my invention:

arranged bit 'carrying and connecting links, .s aid bit carrying links each havingfa projecting bit carrying portionyand means for holding: a'jbit' formed therein, and renewable 'means for proand for holding a cutter bit in said bit carrying portion includinga. shield having. interengaging longitudinally slidable connection with said pro,

jecting bit carrying portionfto prevent movement;

of said shield outwardly away from said bit carrying portion when in'positionto clamp said bit. in said bit carrying portion said shield extending around the sides and forward-and rear ends of said bit carrying portion, andmeans connected between said bit carrying portion and the rear end of said shield for engaging said shield with, a cutter bit in said'bit receiving recess and for holding said bit in said bit carrying portioh; I

3. In a cutter chain, a plurality of alternately,

bit receiving portion against abrasion and for" holding a cutter bit in said bit carrying portion including a shield adapted to encloseltheadvance end, and sides of said bit carrying portion and mounted for longitudinal slidable movement with respect thereto, said shield having an inner face adapted to'engage a forward face of, a cutter bit 7 w v v tiontmay be embodied, it"

will be understood that the"construction thereof w and the arrangement of'the various parts may be. a1tered1without departing from the spirit and J1; In a cutter-chain; a pluralityjof namely,

and means for positively engaging saids'hieldj with said cutter bit for holding said bit in said bit receiving recess, and an'interengagingtongue and slot connection between'saidbit carrying portion and the inside of the advance end'fof' said shield, arranged to prevent outward move-; ment of said shield with respect to said bit carry-" ing portion but to permit longitudinal movement I Y of said shield with respect to said bit carrying;

portion, when said means for engagingsaidshield' with said cutter bit' is released, to permit re-j tmoval'of said shield from said bit carrying per-1 tion. j a 'a cutter chain, a plurality of alternately' arranged bit carrying and connecting links, each of saidbit carrying. links having a projecting bit carrying portion having a bit receiving recess rholding a cutteribit therein; including ashield" adaptedf tofenclosie the advance end and sides" of said bit carrying portionandfmounted *for' longitudinal slidable movement with respct thereto, said shield havin ja inner face adapted" to engage a forward face of ;a-.cutt e1fl bityforf,

holding said bit to said bit receiving recesaQa tongue projecting V forwardly from said bit carryw ing 7 portion adjacent the lower' end thereof, :fa

slot' formed fan the inside of said shield and" adapted to be engagedbysaidtongue, said tongue andslot bein so arranged as tp,preVentQut ward displacementof 'said shieldwithres ct;

I to said bit carrying portion, but arranged to permit complete removal of said shield from ,said M bit carrying portion when desired;

5. In a cutter chain, a plurality of arranged bit'carrying and connectinglinks, each of said bit carrying links having a projecting bit carrying portion having a bitreceiving recess formed therein, and means for protectingzsaid bit carrying portion against abrasion and for holding a cutter bit in said bit carrying portion including a shield adapted to enclose the advance end and sides of said bit carrying portion and mounted for longitudinal sliclable movement with respect thereto, saidshield having an inner face adapted to engage a forward 'face of a cutter bit for holding said bit in said bit receiving recess, and a tongue and slot connection between alternately,

V -'6. Ina cutter chain, a plurality of alternately arranged bit carrying and connecting links; each shield .having an inner face adapted to engage a forward face of arcutterwbit forholding said" 7 bit in said bit receiving recess, a tongue and 'slot said bit carrying portion and the inside of said v,

shield arranged to prevent outwardmovement of said shield with respect to said bit carrying portion but to permit removal of saidshield from said bit carrying portion, andmeans having connection with the rear face of said "bit carrying portion and with said shield, for drawing said shield towards the cutter bit and for causing said shield to hold said bit in engagement with said bit carrying portion. 1:

- tion, and a screw threaded within the rear face a connectionibetweensaid bit carrying portion and the inside of said-shield, arranged to preventoutward movement of said shield Withrespect to said *bit carrying portion, but to permit removal of said shield from said bit carrying porof said shield and having interengaging bearing connection with the rear portion of saidbit carryingiportion, for drawing said shield longitudinal- 1y towardsthe cutter bit and for holding said shield in engagement with said cutter bit.

EDWARD J. DOBEBLS'IEYIN. 

